Astrophotography with the Nexstar SLT 102

Nebulae only:

Images processed with GIMP and/or Registax or DSS.

All taken with an 102mm F6.5 Celestron Nexstar refractor and Olympus 2020Z digital camera, using afocal projection.

By default, images are scaled by 75% and then cropped to 600x400. This gives scale of ~8''/pixel and roughly a 1.3o x 0.9o field for unzoomed images. Some larger objects are scaled by 50% (as noted), giving 12''/pixel and 2o x 1.3o. A few have not been treated this way yet, and are marked as 'old version's.

Click on any image icon to see the enlarged version ...

M27 - 11min, ISO200 - 30/11/08

M42 (50% scaling) - 47min, ISO200 - stack of 2007+2008

M57 - 3.5min, ISO200 - 17/10/07

NGC2024 (50% scaling) - 25min, ISO400/200 - 10+11/2/09

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